Steam-trap.



1. W. LYTTON.

STEAM TRAP.

I APPUCATION FILED APR.3.1915. 1,291,962. Patented Jan. 21,1919.

. 3 SHEETS-QHEEIT 7 31M uZ/ramZ [ILL 56 Z w l. W. LYTTON.

STEAM TRAP.

APPLICATION FILED APR. 3. 1915.

1,291,962. 4 Patented Jan. 21,1919.

3 SHEETS-SHEEI' 2.

J. W. LYTTON.

STEAM TRAP. V

' APPLICATION FILED APR. 3. \9l5- 1,291,962, Patented Jan. 21,1919.

3 $HEETS-SHEET 3- I Jan-"12rd ldlynow x WWW/4 T T QES; PATENT OFFER 1 t 1'; eqerqeem t a? F eeime VIRGINIA, e wer eema o 1 lwfiipmit sitat e sfl esidillg i n eounty'of Southampton and tank'liinih th 5 see anemi haveiin nt d 'ne vi en l,-Im roven'nents iiiljsteam' l i aps,f 511 9 11 theeol owvi e' a'epec fiw w- Th SIii Y iitiQn em has: to a "e i qt the water o f eondeneationi from the system, eeel e e ma m v: e em'th W t r-nude .u RPt SS BS fia thebo l n- 1n t e ater of eondeiis atibn' is' admitted ti h? 1 7 t e.

slty of forcing the air through water of "eoridensationcollected in the'trap is avoided;

W p' e dej whee, w h ve t in the top-thereof th ough'fivhlch ali aecumu} I ettin n ei p ayes ap eta-provid a hemnest entsxahen a t6 prevent the iihfiustlof steam' from the tienas-tep oii de rea heek t Prevent We? wh e-th 1?. t i l t9 c e e} vacuglm i nwthe 't' mqand 1 to provide a I breeeh leadi 7 111 h v h ys fog .a etunningsteam, from the trap bja ck tosystem; the branch hav ng a check valve therein to prevent the bank pressure of the the steam into the vent. L

A i tant object. of thls invention 1s to provide eteam inlet and. relief valves which ape positively actnated,-and which cannot stiek by accumulations, of seale and. other foreign. substances collected n ,the system;

aildeviceffwhi his, o1:- ciomparati'vely si'mple ih iv m t g, provide. a r 9f operation of prior. traps, and in which the operation s, positive and direct. a

tages of this invention will be more clearly gnderstoool from the followlng detall cle 'teeeipeeewere?! sn'eei fleetion-of Letters Patent. m k-wee 21 3 1, sc m .1 1.-

e w st m t m- 1 a ,r de ee-fi et. 10 nature fqp. use .1 1, steam, systems to collect.

at c valve-to automatically "close the the'ai 'ie'exp l rem t t p.

' a hollow lateral projection The aboveand other objects and advanmeme .1 he 'f l cn panymg" drawings. Where n,

3 w. LYTTON, or FRANKLIN, vmetmeyessmnon TOLYTTON MANUFACTURING Weed ee e 1919- 4 I I mentef he inYI ti nIthe Same. being Shawn eitl QWI F1L I 1 mm,

Fi ure 1 a front' eleva ed f the. im-

peeved. q a st am sys em- 1' i -lli i strates side elevat;ion the n e s ,b w ifl t p and, the h lr of h ,i Fig. 2' iSa' side e a l and nl r d p r of he me. be n een aw yiw hewheme tion of the casing.

F g-T3 5 a teepl ae V ew Of he traP- I ead 1 1 h ap, h w ng the i Fig. ls' atransvere seetion'ta-kenthronih elevation of the trap j ec and in a e me ee fi e e.

the top' 'ofthe trap,

lan'parts, are indicated" by like reference eferring to these drawjngmwhe rein s i ni nu ne'ral throughout 's e, v,eral' env sigma: p o y 0 7' meme J desi n d as and'is of preferably shown, 11 is the eoverier g ome; and "12 Pl? 91 16 Sid an nealfithe bottom of the casing. A'is'uitahle e 3 1 spqsd 11 e sing 0,; 'and'iis mounted o wfloafarm 14, seeu'red to'a suitable eha ft r erse n't ie oute d tion 12, andha'vin'g one end extending therefrom. This float 13is adapted to'be of w p te;

Cylindrical iorth, at i h will" 1%. .l I 15. lemm 1 raised in. he 'sine'10 bywater of coi densation colleeted'from s team'sysiteml by a plpe 16, havlng a non-return cheek'val've 17 therein, andflopening into the top Q1,"

dome 11 of'the trap, cnmulatihg in the waterof condensation may remain in the top of the trap, and the Water may :tall Itoj and be separated from the steam' and ai'fr'.

" The c v r ofdq ell i he Fir-f p sfiim the bottom Qf the S0 that air or steam abv boiler 20, to the "top of the "trapfvvhile the leads preferably directly from the top Qf a,

turn check valve 21 and a thermostatic valve ween The laaae ee Yel e B- fr',

'wardly from the trap,

mits the escape of air from the top of the trap, and automatically closes the vent upon the escape of steam from the vent. The check valve 21 prevents the return of atmospheric air to the top of the trap upon the cutting off of the steam supply and the tendency to form a partial vacuum in the top of the trap by the condensation of the steam. The relief pipe 19 is provided with a branch pipe 23 leading back to the steam system so as to prevent any excess pressure of steam in the top of the trap upon the closing of the thermostatic valve 22 to afford a suitable .vent for the steam from the trap, and to equalize the pressure in system. This branch pipe 23 is also provided with a non-return check valvew24. which insures the passage of the steam outand prevents the return of the steam from the system through the pipe 23. v

-Leading from the bottom of the trap casing 10 is a water return pipe 25 terminating in the lower portion of the boilerv 20 to return the Water of condensation thereto from the trap. This pipe 25 is provided with a check valve 26 to prevent the rise of water from the boiler into the trap under the pressure of the steam in the system.

A by-pass pipe 27 is connected at one end to the water inlet pipe 16 and at its other end empties into the lower end of the boiler 20, to take care of any abnormal flow of water in the pipe 16. The pipe 27 has a dam 28 at its upper end in the form of an inverted U pipe to prevent the normal flow of the water of condensation from flowing directly to the boiler.

The float 13 rises and falls with the passage of water of condensation through the trap and positively actuates the valves for admitting the steam to the top of the trap to expel the accumulated Water of condensation therefrom and for admitting of the venting of the accumulated air and excess steam pressure from the top of the trap.

To accomplish this result the invention contemplates a relatively siinple'and positively actuated mechanism for opening and closing the steam inlet and relief valves. This mechanism comprises a segment 29 secured upon the outer end of the shaft 15 at one side of the hollow projection 12. This segment is adapted to swing with the float 13, admit of thefree operation of a weight lever 30 therein, and to carry the weight lever 30 beyond its center of gravity during the rise and fall of the float, whereby the lever 30 may swing into one or the other of the positions shown in Figs. 2 and 5.

The weight lever carries a suitable weight or is enlarged at its upper end for-the purpose of insuring the dropping of the weight lever 30 from one side or the other of its center of gravity when actuated by the the I memes segment 29.. The weight lever is hinged upon the shaft 15 adjacent the segment 29, and is provided with an inwardly extending arm 31 which is suitably formed or apertured at its outer end for engagement about a rod 32 and adapted for movement longitudinally thereon.

This rod 32 is provided near its upper and lower ends with abutting plates 33 which are yieldingly held by springs 31 which are secured adjustably to the rod by lock nuts 35. The arm 31 is adapted to swing between the abutment plates 31 and to strike and to slightly move these plates at the ends of its up and down movements and to carry the rod 32, therewith. The upper end of a rock lever 36 pivoted.

and, 38 are not for the'stea'minlet valve and are thus positively actuated by the;

weight lever 30, but

ate in their respective valve casings, to posi- 7 these valve stems have fixed thereon the valve heads 4.1 which opertively control the steam inlet' and reliefvalves of the trap.

The trap is disclosed in 1 as being 10: it

cated a short distance above the top of the boiler 20. If it is desired a sight glass 42. may be mounted upon the trap at one side thereof, as shown in Fig. .2, so that the height of water of condensation collecting in the trap may be observed. 1

It is of course understood that it is within the spirit of this invention to vary the details of construction of the above entitled steam trap, and to proportion the parts'as may be found advantageous for various uses to which the steam trap may be put, these changes or modifications being restricted onlv by the scope of the following claims.

What is claimed is 1. In combination with a steam system including a boiler; a casing; a water feed pipe leading from the system to the top of the casing; a water return pipe leading from the bottom of the casing to said boiler; a steam supply pipe leading from the boiler to the top of the casing; a vent pipe'leading from the top of the casing; valves in the vent pipe regulating the atmosphere; a branch pipe leading from the vent pipe to the system to return steam to the system when said first valves are closed; and mechanically controlled valves in said steam and vent pipes, means for alternately controlling said valves comprising a rocker arm pivoted to and exterior to the escape of air to ternately opened and closed to control the passage of steamto the casing.

2. In combination with a steam system including a boiler; a casing; a water feed pipe leading from the system to the top of the casing; a water return pipe leading from the bottom of the casing to said boiler; a steam supply pipe leading from the boiler to the top of 'th'e casing; a vent pipe leading from the top of the casing; valves in the vent pipe regulating the escape of air to the atmosphere; alibranch pipe leading from the vent pip to fthe system to return steam to the system 'rivhen said first valves are closed; and a hy-pass pipe from said water feed pipe to the boiler and having a dam therein to direct water to the casing, the by pass pipe being adapted to carry ofl' abnormal flow of water from the Water feed pipe.

3. In a steam system; a vent pipe; a thermostatic valye in the pipe to admit escape of air and prevent escape of steam from the system; a" check valve in the pipe to prevent ingressof atmospheric air to the system; and a branch pipe leading back to the system to direct steam thereto from the vent pipe upon the closing of the thermostatic valve.

4. A steam trap comprising a single casin having a water inlet at its upper end and a Water outlet at its lower end; a steam inlet pipe opening into the upper end of the motions.

casing; a vent pipe leading from the top of the casing; valves in said steam and vent pipes; valve stems depending from the valves; a rocker arm pivoted at its opposite ends to said valve stems whereby to alternately and positively open and close the valves; a Weighted arm pivoted to and exterior to theicasi'ng and having pivotedconnection with said rocker arm; and a float in the casing adapted to rise and fall with the passage 'of water therethrough for swinging said weighted arm in opposite di- 5. In a steam trap for steam systems, and in combination, a casing having. at its lower end a water return passage, a dome for said casing having a water feed pipe leading from the steam system, a steam inlet pipe leading from the system and an air outlet pipe, a valve controlling said steam in let pipe, a valve controlling said air outlet pipe, a rockerarm pivoted to and exterior to said casing and controlling said steam inlet and air outlet valve, float operated means for actuating said rocker arm to alternately open and close said valve, a thermostatic valve in said; air outlet pipe to prevent the escape of steam therethrough, and a branch pipe leading from the air outlet pipe to the system.

In testimony whereof I have hereunto set my hand.

JARARD W. LYTTON.

copies at this patent may be obtained for five cents each, by addrelsinz the Commissioner of l'atentl,

Washington, D. 0." 

